import glob
from pylab import *

# import colors
from palettable.colorbrewer.qualitative import Set2_7
colors = Set2_7.mpl_colors

params = {
    'axes.labelsize': 8,
    'font.size': 8,
    'legend.fontsize': 10,
    'xtick.labelsize': 10,
    'ytick.labelsize': 10,
    'text.usetex': False,
    'figure.figsize': [4.5, 4.5]
}
rcParams.update(params)


def load(dir):
    f_list = glob.glob(dir + '/*/*/bestfit.dat')
    num_lines = sum(1 for line in open(f_list[0]))
    i = 0
    data = np.zeros((len(f_list), num_lines))
    for f in f_list:
        data[i, :] = np.loadtxt(f)[:, 1]
        i += 1
    return data


def perc(data):
    median = np.zeros(data.shape[1])
    perc_25 = np.zeros(data.shape[1])
    perc_75 = np.zeros(data.shape[1])
    for i in range(0, len(median)):
        median[i] = np.median(data[:, i])
        perc_25[i] = np.percentile(data[:, i], 25)
        perc_75[i] = np.percentile(data[:, i], 75)
    return median, perc_25, perc_75


data_low_mut = load('data/low_mut')
data_high_mut = load('data/high_mut')

n_generations = data_low_mut.shape[1]
x = np.arange(0, n_generations)

med_low_mut, perc_25_low_mut, perc_75_low_mut = perc(data_low_mut)
med_high_mut, perc_25_high_mut, perc_75_high_mut = perc(data_high_mut)

fig = figure()  # no frame
ax = fig.add_subplot(111)

# now all plot function should be applied to ax
ax.spines['top'].set_visible(False)
ax.spines['right'].set_visible(False)
ax.spines['left'].set_visible(False)
ax.get_xaxis().tick_bottom()
ax.get_yaxis().tick_left()
ax.tick_params(axis='x', direction='out')
ax.tick_params(axis='y', length=0)

# offset the spines
for spine in ax.spines.values():
    spine.set_position(('outward', 5))
ax.grid(axis='y', color="0.9", linestyle='-', linewidth=1)
# put the grid behind
ax.set_axisbelow(True)

ax.fill_between(x, perc_25_low_mut, perc_75_low_mut, alpha=0.25, linewidth=0, color=colors[0])
ax.fill_between(x, perc_25_high_mut, perc_75_high_mut, alpha=0.25, linewidth=0, color=colors[1])


ax.plot(x, med_low_mut, linewidth=2, color=colors[0])
ax.plot(x, med_high_mut, linewidth=2, linestyle='--', color=colors[1])

# change xlim to set_xlim
ax.set_xlim(-5, 400)
ax.set_ylim(-5000, 300)

# change xticks to set_xticks
ax.set_xticks(np.arange(0, 500, 100))

legend = ax.legend(["Low mutation rate", "High Mutation rate"], loc=4)
frame = legend.get_frame()
frame.set_facecolor('1.0')
frame.set_edgecolor('1.0')

fig.savefig('variance_matplotlib.png')
